@article{505416,
      note = {At head of title: UN ESCWA; UNSD; OPEC.},
      url = {http://digitallibrary.un.org/record/505416},
      title = {OPEC Oil and Gas Statistical System},
      publisher = {UN,},
      recid = {505416},
      pages = {10 p.},
      address = {[Beirut] :. 2003-07-02},
      year = {2003},
      month = {Jul},
}